 Porsche Classic 20w50 Motor Oil |
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| Geezer914 |
 Sep 17 2022, 06:58 AM
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#1
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Geezer914  Group: Members Posts: 1,747 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States 
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Anyone using Porsche Classic 20w50 motor oil? If so have you noticed any changes to cooling or oil pressure?
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| Geezer914 |
Sep 18 2022, 12:58 PM
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#2
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Geezer914 Group: Members Posts: 1,747 Joined: 18-March 09 From: Salem, NJ Member No.: 10,179 Region Association: North East States
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Bump.
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| 930cabman |
Sep 18 2022, 01:19 PM
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#3
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Advanced Member Group: Members Posts: 3,632 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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It sounds expensive. I have used Castrol 20W 50 for 50 years in all my air cooled machines without incident. The formulation has probably changed, but it works well for me and available at FLAPS
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| windforfun |
Sep 18 2022, 03:13 PM
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#4
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Senior Member Group: Members Posts: 1,961 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
QUOTE(Geezer914 @ Sep 17 2022, 05:58 AM)  Anyone using Porsche Classic 20w50 motor oil? If so have you noticed any changes to cooling or oil pressure? Yes & no. I love the stuff. (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) (IMG:style_emoticons/default/beer3.gif) |
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| krazykonrad |
Sep 18 2022, 03:36 PM
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#5
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Senior Member Group: Members Posts: 1,140 Joined: 21-February 06 From: Canton, GA Member No.: 5,610 |
I wonder if the oil is really a special formulation (it may actually be) or just re-bottled Castrol?
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| DennisV |
Sep 19 2022, 01:28 PM
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#6
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Senior Member Group: Members Posts: 545 Joined: 8-August 20 From: Santa Rosa, CA Member No.: 24,575 Region Association: Northern California
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QUOTE(krazykonrad @ Sep 18 2022, 02:36 PM) I wonder if the oil is really a special formulation (it may actually be) or just re-bottled Castrol? It has been discussed in depth on the 356 forums, and probably elsewhere. I don't know if anyone ever got to the bottom of their actual formula. The popular opinion seems to be added zinc. I don't know if you can get to the 356 forum without a membership, so here's an oil analysis post elsewhere. |
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| nathanxnathan |
Sep 19 2022, 01:47 PM
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#7
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Member Group: Members Posts: 294 Joined: 16-February 18 From: Laguna Beach, CA Member No.: 21,899 Region Association: Southern California |
I used Castrol GTX 20w50 for years and years, but I was having a lot of issues with foam on my filler cap. It's said that will happen if you don't drive enough to get the oil hot enough to evaporate the water out of it, but I drive about 25 miles to and another 25 from work every weekday and it was still an issue. Thermostat and cooling flaps are working.
I've switched to Valvoline racing high zinc 20w50 and it seems better. Both are available at my flaps. Edit, I checked it out, and it's not synthetic. Also it does mention vaguely some engineering done to minimize condensation, and also "high alkaline reserve" to neutralize acidification caused by "aggressive combustion residues". |
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| kerensky |
Sep 19 2022, 02:13 PM
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#8
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Senior Member Group: Members Posts: 531 Joined: 1-February 06 From: Norman, OK Member No.: 5,508 Region Association: Southwest Region |
Where would one buy this stuff? Mail order?
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| nathanxnathan |
Sep 19 2022, 02:21 PM
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#9
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Member Group: Members Posts: 294 Joined: 16-February 18 From: Laguna Beach, CA Member No.: 21,899 Region Association: Southern California |
QUOTE(kerensky @ Sep 19 2022, 01:13 PM) Where would one buy this stuff? Mail order? I was looking here. Cool old school-looking metal cans. $$ if that is a quart. https://www.suncoastparts.com/product/SKU20W50OIL.html It looks like Pelican has it in a larger size. Not sure exactly if it's apples to apples, but at $60 if that's a 5 qt size, it's about double what you'd pay for Castrol or Valvoline |
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